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In the design and operation of batteries, effective heat transfer and protection against high operation temperatures are significant issues affecting the lifetime of the battery. This is particularly the case for batteries intended for hybrid machines, where the peak power and current requirements are high. This paper introduces a structure of the thermal protection system for the high-power lithium-ion...
The paper considers on-board battery charging of electrical vehicles (EVs) using a multiphase voltage source and a multiphase propulsion motor. The multiphase inverter and the multiphase machine are fully integrated into the charging process. The proposed integrated on-board battery charger has an advantage of unity power factor operation with no torque production in the machine during the charging...
This paper presents a hybrid PV-battery grid connected system suitable for high power PV power applications. High power PV systems have impressive voltage fluctuation with regards to their maximum power point voltage. Using DC/DC converters to regulate this voltage is inefficient in high power systems as it adds an extra power conversion stage. On the other hand switching frequency, voltage stress...
The aim of this paper is to determine an appropriate model of a hybrid diesel-electric locomotive in order to estimate its fuel consumption and test new energy managements. The locomotive is composed of a diesel-based generation subsystem, a battery — supercapacitors storage subsystem and a traction subsystem. A quasi-static model of the locomotive has been carried out from dynamical model. It allows...
This paper focuses on the way to use the EDLC bank in a small electric vehicle (EV). In a recent study of an EV, a supercapacitor (EDLC; Electric Double Layer Capacitor) is adopted into an energy storage system to improve energy efficiency. Generally, the EDLC bank consists of a large number of cells because the EDLC bank cell voltage is very small compared with the battery terminal voltage, which...
This paper deals with the approach of integrating a CSI into the power train of a BEV using a nouveau control strategy. The proposed control strategy for CSI provides a better harmonic performance of the electrical machine and is therefore a beneficial advantage for the system performance. Using a test setup especially designed for experimental validation of CSI the introduced control strategy is...
In this paper, seamless model of bi-directional DC-DC converter which is applicable to bi-directional power transfer is proposed. Conventional modeling method of bi-directional DC-DC converter is complex, because different models are needed for different directions of power flow. On the other hand, seamless model can be applied for both directions of power flow. Seamless circuit model is expressed...
After the 3.11 earthquake in Tohoku district in Japan, energy saving and renewable energy utilization become one of the important problems in Japan. East Japan Railway Company, as a public transportation company, tries to contribute to solve these problems by realizing eco-friendly railway transportation system. In this paper, three realized and under construction projects are summarized which enhance...
Power storage system using battery and super-capacitor are more and more popular in renewable energy, smart grid and electrical vehicles. But the voltage and current of the basic battery cells and super-capacitor are limited. So in practical applications, a large number of cells are connected in seriously or parallel to improve the output voltage and current ability. Due to the differences between...
The high cost of Electric Vehicles (EVs), their low driving range and their long charge time limit the automotive market share. In this paper, a new concept of slow/fast low-cost on-board battery charger for EV or plug-in hybrid EV, developed by Valeo, is presented. The major innovation is that a same converter device operates in the charger and traction modes. In charger mode, the electric machine...
This paper presents an optimal current control for the hybrid excitation synchronous motor in electric vehicle application. The whole electric propulsion system is modeled including the battery and converters. The control aims to meet the torque and speed requirements while insuring minimal copper and iron losses as well as inverter and chopper losses. Extended Lagrange multipliers optimization method...
Electric vehicles (EV) require energy storage with high power and high energy-density. A hybrid-storage-system combining battery (high energy density) and ultra-capacitor (high power density) to supply a motor is logical. This paper will present an efficient way of dimensioning the ultra-capacitor of this system. The optimal size is determined by applying real driving cycles to a dynamics simulation...
This paper deals with the control of a haptic device which is used in a generator mode to produce electricity from a user's walking movements in a handheld device, like a mobile phone for instance. We first present the design principle of such a device. Then, a design is presented, which allows haptic feedback and energy harvesting to be produced with a same device. It is based on a piezoelectric...
The paper deals with the fundamental research for the design of an electric drive system for a sailplane in cooperation with the oldest and one of the largest sailplane manufactures Alexander Schleicher1. The realizability of this purpose is checked by a system perspective of the electric drive system. Different approaches are considered, e.g. a system with a gear, a downsized motor or an air drag...
This paper deals with a state of charge (SOC) observer for a lithium ion battery, based on a Kalman filter and on the main electrochemical phenomena modeling. In this paper, a method to consider the hysteresis phenomenon on the Open Circuit Voltage has been developed and included into a SOC observer.
The series architecture of a Hybrid Electric Locomotive (HEL) using the Energetic Macroscopic Representation (EMR) is suggested in this paper. Indeed, the EMR organizes systems as interconnected sub-systems, improving modularity and flexibility. Firstly, primary and secondary sources' dynamical models are developed using the EMR. Batteries, Ultra-Capacitors (UCs), rheostat, diesel driven generator...
Removing the fault current in DC circuits is comparably difficult since the DC current has non zero-crossing point like in AC current [1,2]. Thus, developing dedicated DC circuit breakers is necessary to get safety for human body and electrical facilities [3,4]. This paper proposed a novel DC circuit breaker against inductive loads. The performance of the proposed DC circuit breaker was verified by...
Multi-terminal DC (MTDC) systems are drawing a lot of interest lately in applications related to distributed generation, especially in those that integrate wind or PV systems together with energy storage. This paper proposes an improved strategy for the primary control of MTDC integrating energy storage (ES) units. The concept is based on the combination of a droop control method and dc-bus signaling...
Electric motors are key components in all electric drivetrains, particularly battery electric vehicles (BEVs). Consequently, the control strategies of those electric motors play an important role in the development of high performance BEV powertrains. Therefore, this article presents the control design, analysis and comparison of different motor control strategies. In this paper, the most popular...
The development of fast MPPT (Maximum Power Point Tracking) algorithms for photovoltaic (PV) systems able to track variable irradiation conditions with high bandwidth is becoming attractive, especially for mobile applications. This paper focuses on the well known ripple correlation technique, proposing an analysis that provides an upper bound to the convergence time in response to solar irradiation...
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